| Abbreviation | Definition |
|---|---|
| IAC | In Active Case |
| IAC | Inaffective Assistance of Counsel |
| IAC | Indiana Administrative Code |
| IAC | Industrial Arbitration Court |
| IAC | Ineffective Assistance of Council |
| IAC | Interagency Commission for Outdoor Recreation |
| IAC | Intermediary Advisory Committee |
| IACA | International Association for Court Administration |
| IACAC | Inter-American Anti-corruption Convention |
| IACE | Illinois Association of Code Enforcement |
| IACHR | Inter American Court of Human Rights |
| IACL | International Academy of Comparative Law |
| IACL | International Arbitration Case Law |
| IADL | International Association of Democratic Lawyers |
| IAEIA | International Association of Law Enforcement Intelligence Analysts |
| IAFIS | Integrated Automated Fingerprint Identification System |
| IAFL | International Academy of Family Lawyers |
| IAG | Illinois Attorney General |
| IAIU | Institutional Abuse Investigation Unit |
| IAJ | International Alliance for Justice |